Carbureter.



H. L. KIMMELL.

CARBURETER.

APPLICATION FILED FEB. 20. 1908.

Patented Oct. 12, 1915.

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PATENT @FFCFL HERBERT Il. KIMMELL, OF LOS ANGELES, CALIFORNIA, ASSIGNOR,BY MESNE ASSIGN- MENTS, TO W. E. BIANCHI TOMPKINS, OF NEW YORK, N. Y.

' CARBURETER.

Application led February 20, 1908.

To all whom t may conce/m.'

Be it known that I, HERBERT LIKIMMELL, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented a new and useful Carbureter, of which thefollowing is a specification.

This invention relates to carbureters, and the main object of theinvention is to provide for furnishing a perfect mixture of gas and airunder all conditions of speed and atmosphere, and to ydeliver asubstantially uniform amount to each cylinder. The latter feature is ofconsiderable importance for,.as is well known, in a multi-cylinderengine the suction will vary in the different cylinders and when acylinder having good suction takes its charge from the carbureter, ifthe latter is of ordinary type, the next cylinder in succession having aweaker suction is unable to get its quota of mixture as the previouscylinder has depleted the supply.

Another object is to eliminate the usual automatic air inlet valve andto provide for positively regulating the size of the air inlet tocorrespond to the oil inlet or needle valve opening.

Another object is to enable the device to be easily adjusted withoutremoving it from the engine.

Referring to the drawings, Figure 1 is a vertical sectional view throughthe device, the view being taken on line v1-w1 Fig. 2. Fig- 2 is a planView. Fig. 3 is a section on line o23-'m3 Fig. 2. Fig. 4 is a section online 064mm* Fig. 2. Fig. 5 is an end elevation of the air valve.

1 designates a float valve chamber in which is a float valve 2 operatinga rock-arm 3 pivoted at 4 and having an arm 5 which engages in a groove6 in an automatic oil inlet valve 7, the lower end' of which is taperedto co-act with a valve seat 8 formed in a nipple 9 which is screwed intothe lower end of the side casing 10 and the nipple has a central bore 11through which the oil is fed. `The upper end of the valve 7 slides in aplug 12 which is screwed in the upper end of the casing 10. Oil entersthrough nipple 9l and iows past the valve 7 into the float valve chamber1 and rises to the level indicated causing the float 2 to Vrise-whichmoves downvalve 7 aga-inst: valve Specification of Letters Patent.

Patented Get. 12, 1915.

sei-mno. 416,916.

float 2 descends and lifts valve 7, thereby permitting oil to again flowinto chamber 1 and replenish the same; thus the float 2 and valve 7automatically operate to maintain a substantially constant level of oilin the chamber 1. In this connection it should be noted that the closingmovement of the valve 7 is downward and the valve 7 is located above thevalve seat 8. This gives an unobstructed flow of the oil past the valveseat and dispenses with a stuffing box below the valve seat therebyavoiding leakage. From the chamber 1 the oil flows through a passage 13to a valve chamber 14 in which is a set valve 15, the lower end of theset valve 15 being screwed in an extension 16 of the chamber 14, astufling box 17 being employed to prevent leakage. At the upper end ofthe valve chamber 14 is a valve seat 18 which co-acts with set valve 15to regulate the passage of oil into the superimposed mixing chamber 19.The set valve 15 is always open and should be adjusted so that asulicient amount of4 oil will flow by gravity past the valve seat 18into the mixing chamber 19 to start the engine, but, as will be laterexplained the set valve 15 does not furnish oil for the regular runningof the engine after it has been started, the oil for regular runningbeing admitted through a valve sea-t 20 which is also located at the topof the valve chamber 14. The level of the valve seat 20 is below thelevel of the valve seat 18 for a purpose to be described.

The valve seat 20 is controlled by a gaso l'ene valve 21 the stem ofwhich is threaded in a sleeve 22, the valve 21 being adjustable inthesleeve 22 but it does not turn normally therein, being locked in itsregulated position in the sleeve by a stufng box 23, the latter servingthe double function as stuliing box and locking means. By loosening thestuffing box 23 the gasolene valve 21 may be adjusted by screwing it upor down in the i sleeve 22. The sleeve 22 is provided externally withrelatively coarse threads and is screwed into a projection 24 of thecasing 25 which incloses they mixingA chamber 19. A slotted rock-arm 26yis provided with a split hub 27 which is clamped to the'sleeve 22 and byoperating the rock-arm 26 the sleeve may be turned and at the same timemoved longitudinally by its threaded portion thereby imparting alongitudinal movement to the valve 21 causing the valve to advance orrecede from its seat 20, according to the direction in which the sleeveis turned.

An intermediate air chamber 28 is located below the mixing chamber 19and is closed to the atmosphere except by an air inlet opening 29. Atits upper end the chamber 28 communicates with the mixing chamber 19.Slidable within the casing 25 which 'forms the mixing chamber is an airvalve 30 which comprises a shell having two wide slots 31 and 32 and onenarrow slot 33, the slot 32 extending through nearly the entire lengthof the shell, being formed to maintain constant communication betweenthe mixing chamber 19 and valve seats 18 and 20 and air chamber 28irrespective of the position in which the shell 30 may be. rlhe slot 33is formed to give room for the valve 21 and allow full movement for theair valve 30 as the latter extends diametrically through the valve 30.The slot 31 is ex tended back only part way from the top of the shelland when the valve 30 is closed the slot does not fully meet the endwall of the passage 34; and the passage is thus left open for a narrowspace, as shown in a, to permit of the passage ot' a limited amount ofgas and air therethrough in starting the engine. At this time the oilwhich enters the mixture chamber enters by gravity past the set valve 15as the gasolene valve 21 is closed and the air for the mixturc entersthrough the opening 29 into the air chamber 23 thus entering the mixingchamber .vhere it combines with the oil therein and the mixture entersthrough the narrow slot in passage 341 into the reservoir chamber 35which is located above the float valve chamber 1. From the reservoirchamber 35 the mixture enters the induction pipes, not shown, by whichit is conducted to thecyiinder or cylinders.

ri liter the engine has been started, the main gasolene valve 21 israised from its seat 20 to admit more gasolene, and at the same time theair valve 30 is moved to a corresponding extent to admit air to producethe requisite mixture. Gasolene now enters the mixing chamber 19 almostentirely through the seat 20, and only a small amount will enter throughthe seat 18, although open to the same extent as before. The reason isthat suction applied to auid at one end of a conduit is increased ordiminished at the other end thereof according as the irst end is greateror less than the second and approximately in the same ratio. Thus, itthe area of the annular passage between the conical end of the valve 21and its conical seat 20 be four times as great at the top as at thebottom, the suction will be increased at the bottom of said passageapproximately in the ratio 1 to 1. Conversely, under similar butreversed conditions, the suction at the top of the annular conduitbetween the valve 15 and its seat 18 will be decreased approxi mately inthe proportion t to 1. rThus, although the levels o1 the fluids at thetwo valve seats are the same and said valves are opened to the sameextent, the suction of the engine will be 16 times as effective on thegasolene at the valve seat 20 as at the valve seat 18.

By the above-described arrangement the engine may be started with themain gasolene valve 21 practically closed, so that the engine does notrace immediately after starting. Also, since a given volume ot mixturewill enter the engine at a fixed position of the throttle, regardless ofthe momentum ot the engine, the engine will not race when the clutch isreleased.

A link 36 is adjustably attached by a bolt 36 to slotted arm 26 and theother' end of link 36 passes slidably through a block 37 which ispivoted to an arm 38, the arm 38 being attached to a stem 39, the stem39 passing through the end ot the mixing chamber casing 25 and beingattached to the valve 30. The link 36 has a head 10 which bears againstthe block 37 and a coil spring i1 is mounted on the other side of theblock and is fastened to the link 36 and tends to retract the link 36 tohold its head 10 against block 37, yet it permits the air valve stem 39to be pushed in, block 3'? sliding until link 36 compresses spring 4:1,after the link 36 has moved the slotted arm 26 into such position thatthe gasolene valve 21 is closed. Thus. after the gasolene valve has beenclosed, outward movement ot the valve 30 will not cause a similaroutward movement oit link 36 and lifting oit throttle valve 21, untilblock 3.7 strikes the head l0 of link 36.

The casing 25 is formed with an air inlet opening l12, which is openedby the movement of the valve 30 in the direction corresponding to theopening movement of the valve 21. By adjusting the link 36 on theslotted arm 26, the desired ratio of opening and closing movementbetween the valve 21 and the opening and closing ofthe air inlet 12, maybe secured. A very important feature of my invention resides in the formof this opening 42, by which there is obtained a proper mixture of airand gasolene vapor at whatever rate they are supplied to the engine. Sofar as l am aware, in all prior forms of carbureters in which anauxiliary air supply is automatically increased with the gasolenesupply, the air inlet opening thereof has been increased at the sameratio as the gasolene inlet opening. But by reason of the increasedspeed of the engine when more gasolene is supplied thereto, not only isthe suction greater on the surface of laaaoe the gasolene at the maingasolene valve, but on the surrounding air drawn from the chamber 28,and which is used to spray said gasolene. Hence more gasolene issupplied to the engine than would result merely from the increase sizeof the gasolene inlet. I provide for this increased gasolene supply byforming the inlet opening 42 triangular, or with divergent sides, asshown, so that a substantially perfect mixture is obtained at allpositions of the main gasolene valve. I thus dispense with the use of aspring to oppose the opening of the air valve. Since such springs haveto be overcome by the outside atmospheric pressure, they reduce theefective atmospheric pressure by the force of the spring which isrequired to be overcome. The reduction in the effective pressure causesincompleteness of the filling of the cylinder with mixture, thuscorrespondingly reducing the effectiveness of the engine.

That I claim is l. In a carbureter,the combination of a float chamber, afloat therein, a valve controlled by the ioat for regulating theadmission of gasolene to the float chamber, a cylindrical horizontalmixing chamber at one side of the ioat chamber, a gas chamber supportedabove the ioat chamber and in connection with the mixing chamber, agasolene passage from the float chamberl to the mixing chamber, means tocontrol the admission of air to the mixing chamber, a sleeve threaded inthe casing of the mixing chamber, a gasolene valve to control saidpassage screwed in said sleeve, an arm clamped to the sleeve to move thesame, and a link adjustably attached to said arm, said link being alsoconnected to said air controlling means and permitting limited relativemovement of said means and said gasolene valve.

2. In a carbureter, the combination of a vfloat chamber, a floattherein, a valve controlled by the float for regulating the admission ofgasolene to the float chamber, a cylindrical mixing chamber, supportedon one side of the loat chamber and having an air admission port, a gaschamber supported above the float chamber and in communication with themixing chamber, a gasolene passage from the float chamber to the mixingchamber, an adjustable set valve in said passage for controlling theflow of gasolene therethrough, a second passage from the 'oat chamber tothe mixing chamber, a gasolene valve freely movable for varying the flowof gasolene therethrough, a valve for controlling the air admissionport, said valve also controlling the flow of mixture to said reservoir,and means connecting the air valve stem to the last named gasolene valvefor moving the two simultaneously, said means including a spring topermit relative movement of the valves.

3. In a carbureter, the combination of a cylindrical mixing chamber, aoat chamber at one side of and communicating with the mixing chamber, agas chamber above and supported on the float chamber, a longitudinallymovable sleeve valve to control the admission of carbureted air from themixing chamber to the gas chamber, an inlet port disposed in theunderside of the mixing chamber and a needle valve having its stemextending above the outside of the mixing chamber, the valve cooperatingwith the inlet port to regulate the admission of gasolene from the floatchamber to the mixing chamber, said sleeve valve being slottedlongitudinally to straddle the needle valve.

i. In a carbureter, the combination of a mixing chamber having an airinlet port, a longitudinally movable sleevelike air valve disposedwithin the mixing chamber to control the opening of the air port, agasolene chamber communicating with the mixing chamber, a needle valveto regulate the admission of gasolene from the gasolene chamber to themixing chamber, an externally screw threaded sleeve mounted in the shellof the mixing chamber and supporting the needle valve, an arm secured tosaid screw threaded sleeve, and a link connection be tween said arm andthe stem of the sleevelike air valve, said arm being slottedlongitudinally to permit the connection of the link to the arm to bemoved toward or from the axis of the threaded sleeve.

5. In a carbureter, the combination of a cylindrical mixing chamberhaving an air inlet port and a gasolene inlet port, a gas chamberintegral with the mixing chamber and having a flat underside, a gasolenechamber fitting against the underside of the gas chamber, a conduit toconduct the gasolene from the gasolene chamber to the mixing chamber, avalve to regulate the flow of gasolene to the mixing chamber and alongitudinally movable sleeve valve to regulate the admission of air tothe mixing chamber.

6. In a carbureter, the combination of a mixing chamber having a portfor the admission of gasolene, a valve to regulate the admission ofgasolene to the mixing chamber, an externally threaded sleeve mounted inthe wall or" the mixing chamber and supporting the said valve, a slidingair valve in said mixing chamber and having a valve stem extendedthrough the end of the mixing chamber, an arm on said threaded sleeve,an arm on said valve stem and a link pivotally connected to the arm onsaid sleeve and having a sliding engagement with the arm onv le v1,156,084

lene leading from the float chamber to the In testimony whereof, I havehereunto set mixing Chamber, and two Valve controlled my hand at LosAngeles, California, this passages at the Outer end of the duct for 13thday of February 1908.

Controlling the flow of gasolene from said HERBERT L. KIMMELL. 5 duct tothe mixing chamber, one of Said In presence ofvalves being normally openand having a GEORGE 'I`. I-IACKLEY,

higher Valve seat than the other. FRANK L. A. GRAHAM.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

It is hereby certified that the name of the assignee in Letters PatentNo.

1,156,084, granted October 12, 1915, upon the application of Herbert L.Kiminell,

of Los Angeles, California, for an improvement in Oarburetels Waserroneously Written and printed as W. F. Bianchi Tompkins, Whereas saidname Should have been Written and printed as Bianchi Tompkins; and thatthe said` Letters Patent should be read with this correction thereinthatl the same may conform to the record of the ease in the PatentOffice.

Signed and sealed this 18th day of January, A. D., 1916.

[SEAL] J. T. NEWTON,

Acting Commissioner of Patents. C1. L18--150.3.

